Valve seat ring driver



April 25, 1933. F. o. ALBERTSON VALVE SEAT RING DRIVER Original Filed Feb. 18, 1929 J/a'iezgf p )MZW awmm Patented Apr. 25, 1933 UNITED. STATES PATET FRANS 0. ALBEBTSON, 0F SIOUX CITY, IOW'A, ASSIGNOB T0 ALBERTSON 8t'G01VIPANY, INC,

OF SIOUX CITY, IOWA, A CORPORATION OF I VALVE .SEAT nine DRIVER Original application filed February 18, 1929, Serial No. 340,770. Divided and this application filed December 7, 1931. Serial No. 579,433. a i

The present invention relates to valve? seat reconstruction tools, and is particularly concerned with the provision of improved tools for providing the valve seat of an internal combustion engine with a new valve seat ring or for installing valve seat rings as a part of the original equipment of the internal combustion engine. 1

It is often desirable to provide the block of an internal combustion engine with a valve seat of different material from that of which the block itself is constructed. The valve seat is subjected toharder wear than other parts ofthe engine block and it is desirable that the valve seat should be constructed of metal peculiarly adapted to resist the heat and withstand the pounding of the valve. Furthermore, if an ordinary valve seat of an internal combustion engine has been subjected to acertain amount of grinding, the material is worn away to such an extent that it is highly desirable and often absolutely necessary to provide a new valve seat ringr' Such valve. seat rings may be made of the best iron alloy having qualities of heat resistance and uniform hardness which will be retained after the ring is inserted in the motor block and exposed to heat from explosion in a running motor, and the valve seats may be made more durable and efiicient than it is possible to make a valve seat'which is formed in the material of the motor block.

The present application is a division of my prior application, Serial No. 340,770, filed February 18, 1929.

One of the objects of the invention is the provision of improved tools for installing valve seat rings of the class described.

Another object is the provision of an improved valve seat tool assembly which is peculiarly adapted to be utilized in installing new valve seat ringsin the motor blocksof internal combustion engines. Another object is the provision of an improved valve seat ring installing tool with adapters which may be utilized in installing valve seat rings of different sizes.

Another object is the provision of an improved valve seat construction including a valve seat ring which may economically and efiiciently.

Other objects and advantages of the in vention will be apparent from the following description and from the accompanying drawing, in which similar characters of reference indicate similar several views.

, Referring to the single sheet of drawings;

Fig. 1 is a view in perspective, showing the operation of installing a valve seat ring;

Fig. 2 is a verticahsectional'view taken along the axis of the pilotstem, with the pilot stemshown in elevation;

Fig. 3 is a view in perspective of one of the valve seat rings;

Fig. 4 is a v ew similar to ig. 2, of an-.

other modification.

Referring to Fig. 1, 10 indicates in its entlrety the blockof an internal combustion engine wh'ich'is provided with a plurality of pilot stems has its lower end fixedly'secured in the guide 13, the axis of the pilot being located along the line of the axis of the guide 13. The pilot 14 is provided with a frustoe conical portion 15 engaging the upper end of the guide 13 to center the pilot at that end, and with a split end .16 having'a cam ming rod 17 for camming apart the parts of the ends 16 to centerand securethe' lower end of the pilot. I

The pilot 18. shown in Fig. 4 is provided with a gradually tapered surface 19 which is adapted to be frictionally engaged and wedged into the upper part of the guide 13 to secure the pilot in place. The taper of the'portion 19 is so gradual that the pilot may be forcibly wedged into the guide and be installed most parts throughout the secured in place, without the necessity for any other securing devices. The taper is preferably within the limits of fifteen to thirty thousandths of an inch taper per foot of length, and preferably about twenty-two one-thousandths of an inch per foot, that is, the diameter of the pilot increases twenty two one-thousandths of an inch for eaehfoot of its length.- This pilot, per se, forms the subject of another application, Serial No. 538,504, filed May 19, 1931.

The pilot 18 has the major portion of its lower end 20 formed cylindrically and corresponding closely to the size of the guide 13. The pilots 18 are furnished in sizes dif fering only by one-thousandth of an inch,

so that they fit the guides very closely, and

they may be secured in place by the use of a pin passing through the aperture 21 by means of which the pilots are rotated and pushed downward to secure them in place in'the guide 13.

The motor block 10 shown in Fig.2 has already been subjected'to a cutting operation by means of the tools described in the prior application, of which this application isia continuation in part.

The motor block 10 has been formed with an annular recess 22 which is slightly smaller in diameter than the exterior diameter of the valve seat ring 23. The annular recess 22 has a substantially cylindrical, vertical wall, and a substantially flat base 24, the base and outside being complementary in shape to that of the valve seat ring 23, except that the ring is slightly larger in diameter, as previously described.

The ring 23 preferably comprises an annular member having a substantially rectangular cross-section, and preferably formed by casting and machining the ring out of an iron alloy adapted to resist heat and to withstand the pounding of the valve. Any material having more desirable characteristics than those of the internal combustion engine block lOitself, may be used.

The ring 23 is placed above the recess 22 and driven into the recess by means of a driver 25. The ring 23 being slightly larger than its recess, considerable force must be used in driving the ring, and when the ring is driven, its outer surface frictionally engages the inner surface of therecess 22 to secure the rin' in lace.

The driver 25 preferably comprises a substantially cylindrical metal body 26 having a substantially fiat upper end 27 to be engaged by a hammer 28 in driving the ring 23-home. The driver may be provided with a knurled surface 29 to be grasped by the hand, and it is preferably provided with an enlarged base 30 of substantially disc shape and extending radially sufiiciently so that the flat bottom 31 of the, base 30 engagesthe upper side of the ring- 23.

I It is also for this reason that adapters32 are employed for larger rings instead of making the driver large enough for the .largest ring 'and smaller adapters may be employed for driving smaller rings.

In case the valve seat ring 23 is larger than the base 30 of the driver 25, an adapter 32 may be utilized. The adapter 32 merely comprises a disc of metal having an aperture for receiving the pilot 14 and adapted to engage the upper side of the valve seat ring 23.

The driver 25 is provided with a substantially cylindrical bore 33 l which may be of sufficient size to receive the cylindrical tool holder 34 which is slidably mounted on the pilot 14 in Fig. 2. The tool holder 34 comprises a cylindrical member formed with a tapered surface 35 for receiving the valve seat cutter which was used in making the recess 22, and the tool holder 34 is slidably and rotatably mounted on the upper cylindrical end 36 of pilot 1 1,, by means of thecylindrical bore 37 in the tool holder Referring to Fig. 4, it will be noted that if desired the driver 25 maybe provided with a smaller aperture adapted to be slidably mounted on the cylindrical end 36 of the pilot 19, thereby eliminating the tool holder from the combination.

In either event, the driver 25 is slidably mounted upon the pilot 14 or 18, and is adapted to be guided in a vertical direction in the driving of the ring 23, and the driver and ring are thereby prevented from springing out of place during the driving operation. As the ring is driven from the position of Fig. 1 to that of Fig. 2 or Fig. 4, the driver and ring are guided by the pilot and the ring is quickly located and fixedly secured in the motor block in the position shown inFig. 2. The valve seat ring may then be cut down by means of a reamer to form the valve seat, and the valve seat may be finished in the usual way.

It will thus be observed that I have inventedan improved valve seat tool and assembly, which are capable of installing valve seat rings in the block of internal combustion engines in the most eflicient and economical manner. The internal combustion engine block may thus be provided with valve seats which are better for that purpose than the material of which the 'block is constructed, and the valve seats may be refinished even after much of the motor block has been worn away.

While I have illustrated a preferred embodiment of my invention, many modifications may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of construction set forth, but desire to avail myself of all changes within the scope of the appended claims.

Having thus described my invention, what I claim is new and desire to secure by Letters Patent of the United States, is:

1. A valve seat ring driver comprising a metal member having an impact surface at one end and having a driving surface at the opposite end for engaging a valve seat ring, said member having an intermediate handle portion for engagement with the hand of the operator in driving the ring, said ring driver having a cylindrical bore extending into the same anda valve stem pilot having a complementary cylindrical surface for slidably supporting said ring driver during the driving of a valve seat ring.

2. A valve seat ring driver comprising a metal member having an impact surface at one end and having a driving surface at the opposite end for engaging a valve seat ring,

said member having an intermediate handle portion for engagement with the hand of the operator in driving the ring, said ring driver having a cylindrical bore extending into the same and a valve stem pilot having a complementary cylindrical surface for slidably supporting said ring driver during the driving of a valve seat ring, and a spacer memher having a similar bore for receiving said pilot stem, said spacer member having an upper driver engaging surface and a lower driving surface and being of circular shape and of greater diameter than said ring driver for engaging a valve seat ring of greater diameter than said ring driver.

3. A valve seat ring driver comprising driving means having an impact surface at one end and having a driving surface at the other end for engaging a valve seat ring, said driving means having an intermediate cylindrical surface for engaging a guide means, guide means adapted to be fixedly secured to the engine block and having a complementary cylindrical surface for slidably engaging t e cylindrical surface on said driving means during the installation of a valve seat ring, said guiding means supporting said driving means for sliding movement substantially axially of the valve seat aperture.

In witness whereof, I hereunto subscribe my name this 4th day of December, 1931.

FRANS O. ALBERTSON. 

